Idence uestion 4, HW Score: 20.6370, 1.25 Points Intervals - Sigma Unknown T (6.2 Part 1 of 3 Points: 0 of 1 Save Next question In a random sample of 8 people, the mean commute time to work was 36.5 minutes and the standard deviation was 7.4 minutes. A 98% confidence interval using the t-distribution was calculated to be (28.7,44.3). After researching commute times to work, it was found that the population standard deviation is 8.5 minutes. Find the margin of error and construct a 98% confidence interval using the standard normal distribution with-the appropriate calculations for a standard deviation that is known. Compare the results. The margin of error of u is (Round to two decimal places as needed.)